BQ24125RHLT

Product Overview

Category

BQ24125RHLT belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This IC is commonly used in portable electronic devices, such as smartphones, tablets, and wearable devices, to efficiently charge lithium-ion batteries.

Characteristics

• High charging efficiency
• Compact package size
• Low power consumption
• Wide input voltage range
• Multiple charging modes
• Overvoltage and overcurrent protection

Package

BQ24125RHLT is available in a small 20-pin QFN (Quad Flat No-Lead) package, which allows for easy integration into various electronic devices.

Essence

The essence of BQ24125RHLT lies in its ability to provide a reliable and efficient charging solution for lithium-ion batteries, ensuring optimal performance and extended battery life.

Packaging/Quantity

This IC is typically sold in reels or tubes, with each reel/tube containing a specific quantity of BQ24125RHLT units. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 4.35V - 6.45V
• Charging Current Range: 500mA - 2A
• Operating Temperature Range: -40°C to +85°C
• Battery Voltage Regulation Accuracy: ±0.5%
• Charge Termination Accuracy: ±5mV
• Standby Current: <100µA

Detailed Pin Configuration

1. VBUS: Input voltage from the USB port.
2. AC/DPDM: Detection pin for determining the type of charger connected.
3. PGND: Power ground connection.
4. STAT: Status output pin indicating charging status.
5. TS: Thermistor input for temperature monitoring.
6. ISET: Charging current setting pin.
7. EN: Enable pin for turning the IC on/off.
8. VBAT: Battery voltage connection.
9. TS/DP: Thermistor input or D+ data line connection.
10. SRN/SRP: Sense resistor connections for current sensing.
11. ILIM: Input current limit setting pin.
12. SDA: I2C serial data input/output pin.
13. SCL: I2C serial clock input pin.
14. INT: Interrupt output pin.
15. TS/DM: Thermistor input or D- data line connection.
16. VREF: Reference voltage output.
17. VOUT: Output voltage connection.
18. PG: Power good output indicating successful charging.
19. GND: Ground connection.
20. VIN: Input voltage connection.

Functional Features

1. High Efficiency Charging: BQ24125RHLT incorporates advanced charging algorithms to maximize the efficiency of the charging process, reducing energy waste.
2. Multiple Charging Modes: This IC supports various charging modes, including constant current (CC), constant voltage (CV), and trickle charge, ensuring optimal battery performance.
3. Overvoltage and Overcurrent Protection: BQ24125RHLT includes built-in protection mechanisms to prevent overvoltage and overcurrent conditions, safeguarding both the battery and the charging circuitry.
4. Thermal Regulation: The IC monitors the temperature during charging and adjusts the charging parameters accordingly to prevent overheating and ensure safe operation.

Advantages and Disadvantages

Advantages

• High charging efficiency leads to reduced charging time.
• Compact package size allows for easy integration into small electronic devices.
• Wide input voltage range enables compatibility with various power sources.
• Multiple charging modes cater to different battery types and charging requirements.
• Built-in protection mechanisms enhance safety during the charging process.

Disadvantages

• Limited availability of alternative models from other manufacturers.
• Relatively higher cost compared to some other charging ICs in the market.

Working Principles

BQ24125RHLT operates based on a combination of voltage and current regulation techniques. It starts with a constant current (CC) mode to rapidly charge the battery until it reaches a predefined voltage threshold. Then, it switches to constant voltage (CV) mode to maintain the battery voltage at the desired level while gradually reducing the charging current. The IC continuously monitors the battery status and adjusts the charging parameters accordingly to ensure efficient and safe charging.

Detailed Application Field Plans

BQ24125RHLT finds extensive application in various portable electronic devices, including: - Smartphones - Tablets - Wearable devices (smartwatches, fitness trackers) - Portable gaming consoles - Bluetooth headphones/speakers - GPS devices - Digital cameras

Detailed and Complete Alternative Models

While BQ24125RHLT is a popular choice for battery charging applications, there are alternative models available from different manufacturers that offer similar functionality. Some notable alternatives include: - MCP73831 by Microchip Technology - MAX1555 by Maxim Integrated - LTC4054 by Linear Technology - TPS